I purchased the WGen7500 after much research on web. I believe it fits my needs exactly and will provide me the electricity I need when the power goes out. I live on the Texas gulf coast so hurricanes and recently freezes create power supply issues. I read the manual and it is very useful; everyone should read it. I plan to operate it monthly to ensure and insure my electricity will only be out for a short while when needed in an emergency, so familiarity is a must. The machine operates quietly, though I suggest wearing ear protection, I plan to have an emergency connection to my home electric panel installed; I have an electrician setup to install the needed connections and to discuss the safety aspects of using the home connection. This is important so as to not cause insult to injury due to power feedback from utility provider.